My sister, Julia Wilson-Dickson, who has died aged 66 after a brain haemorrhage, was an eminent voice and dialect teacher who worked with many of the brightest talents of stage and film.

She coached Robert de Niro on Frankenstein (1994), Helena Bonham Carter on Mighty Aphrodite (1995), Julianne Moore for The End of the Affair (1999), Glenn Close on Albert Nobbs (2011), and Eddie Redmayne for the performance as Stephen Hawking in The Theory of Everything (2014) that won him an Oscar. On stage she worked on several Peter Hall productions: with Dustin Hoffman as Shylock in The Merchant of Venice (Phoenix theatre, London, 1989), Vanessa Redgrave as Lady Torrance in Orpheus Descending (Haymarket, 1988), and Judi Dench and Anthony Hopkins in the title roles of Antony and Cleopatra (at the National Theatre, 1987).

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